1106643 has 4 divisors (see below), whose sum is σ = 1475528. Its totient is φ = 737760.

The previous prime is 1106629. The next prime is 1106653. The reversal of 1106643 is 3466011.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1106643 - 2⁴ = 1106627 is a prime.

It is a D-number.

It is a Duffinian number.

1106643 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1106653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 184438 + ... + 184443.

It is an arithmetic number, because the mean of its divisors is an integer number (368882).

2^1106643 is an apocalyptic number.

1106643 is a deficient number, since it is larger than the sum of its proper divisors (368885).

1106643 is an equidigital number, since it uses as much as digits as its factorization.

1106643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368884.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1106643 is about 1051.9710072050. The cubic root of 1106643 is about 103.4353957489.

The spelling of 1106643 in words is "one million, one hundred six thousand, six hundred forty-three".